Subfloor repair involves fixing the structural layer of plywood or OSB beneath finished flooring. A damaged subfloor feels soft, spongy, or squeaky and is often caused by water damage.
In practice
You'd see this when a homeowner notices a soft spot in their bathroom floor near the toilet.
Why it matters
Subfloor repair requires structural knowledge and creates safety hazards if ignored.
Common questions
How do I know if it's subfloor vs. joist damage?+
A contractor can assess whether the plywood panels need replacing or if the underlying joists are also compromised.
Can repairs be done without removing all the finished flooring?+
Often yes — the damaged section can be cut out and replaced without disturbing the entire floor.
Need this done right?
Talk to a real contractor.
Free onsite consultation and a line-item estimate you can actually read.